void block_database::write_position(const position_type position)
{
const index_type height = index_.allocate();
record_type record = index_.get(height);
auto serial = make_serializer(record);
serial.write_8_bytes(position);
}
void block_database::write_position(const position_type position)
{
const auto record = index_.allocate();
const auto data = index_.get(record);
auto serial = make_serializer(data);
serial.write_8_bytes(position);
}
void hashtable_database_writer::write_records_size()
{
const size_t header_size = 24 + buckets_ * 8;
BITCOIN_ASSERT(file_.size() >= header_size + total_records_size_);
auto serial = make_serializer(file_.data() + 16);
serial.write_8_bytes(total_records_size_);
}
void hashtable_database_writer::link_record(
uint64_t bucket_index, uint64_t record_begin)
{
BITCOIN_ASSERT(file_.size() > 24 + buckets_ * 8);
BITCOIN_ASSERT(bucket_index < buckets_);
uint8_t* bucket_begin = file_.data() + bucket_offset(bucket_index);
auto serial = make_serializer(bucket_begin);
serial.write_8_bytes(record_begin);
}
data_chunk create_address_key(
const payment_address& address, const output_point& outpoint)
{
data_chunk result(1 + short_hash_size + 8);
auto serial = make_serializer(result.begin());
serial.write_byte(address.version());
serial.write_short_hash(address.hash());
serial.write_8_bytes(addr_key_checksum(outpoint));
BITCOIN_ASSERT(serial.iterator() == result.end());
return result;
}
void hashtable_database_writer::store(const hash_digest& key_hash,
size_t value_size, write_value_function write)
{
// Calculate the end of the last record.
const uint64_t header_size = 24 + buckets_ * 8;
const uint64_t records_end_offset = header_size + total_records_size_;
// [ tx hash ] 32
// [ varuint value size ]
// [ ... value data ... ]
// [ next tx in bucket ] 8
const size_t record_size =
32 + variable_uint_size(value_size) + value_size + 8;
// If a record crosses a page boundary then we align it with
// the beginning of the next page.
const size_t record_begin =
align_if_crossing_page(page_size_, records_end_offset, record_size);
BITCOIN_ASSERT(file_.size() >= record_begin + record_size);
// We will insert new transactions at the beginning of the bucket's list.
// I assume that more recent transactions in the blockchain are used
// more often than older ones.
// We lookup the existing value in the bucket first.
const uint64_t bucket_index = remainder(key_hash.data(), buckets_);
BITCOIN_ASSERT(bucket_index < buckets_);
const uint64_t previous_bucket_value = read_bucket_value(bucket_index);
// Now begin writing the record itself.
uint8_t* entry = file_.data() + record_begin;
auto serial = make_serializer(entry);
serial.write_hash(key_hash);
serial.write_variable_uint(value_size);
// Call the supplied callback to serialize the data.
write(serial.iterator());
serial.set_iterator(serial.iterator() + value_size);
serial.write_8_bytes(previous_bucket_value);
BITCOIN_ASSERT(serial.iterator() == entry + record_size);
// Change file size value at file start.
// This must be done first so any subsequent writes don't
// overwrite this record in case of a crash or interruption.
BITCOIN_ASSERT(record_begin >= header_size);
const uint64_t alignment_padding =
record_begin - header_size - total_records_size_;
BITCOIN_ASSERT(alignment_padding <= page_size_);
total_records_size_ += record_size + alignment_padding;
// Now add record to bucket.
const uint64_t record_begin_offset = record_begin - header_size;
link_record(bucket_index, record_begin_offset);
}
bool add_credit(leveldb::WriteBatch& batch,
const payment_address& address, uint64_t output_value,
const output_point& outpoint, uint32_t block_height)
{
data_chunk addr_key = create_address_key(address, outpoint);
// outpoint, value, block_height
data_chunk row_info(36 + 8 + 4);
auto serial = make_serializer(row_info.begin());
// outpoint
serial.write_hash(outpoint.hash);
serial.write_4_bytes(outpoint.index);
// value
serial.write_8_bytes(output_value);
// block_height
serial.write_4_bytes(block_height);
BITCOIN_ASSERT(
std::distance(row_info.begin(), serial.iterator()) == 36 + 8 + 4);
batch.Put(slice(addr_key), slice(row_info));
return true;
}
void write_variable_uint(uint64_t value)
{
if (value < 0xfd)
{
write_byte(value);
}
else if (value <= 0xffff)
{
write_byte(0xfd);
write_2_bytes(value);
}
else if (value <= 0xffffffff)
{
write_byte(0xfe);
write_4_bytes(value);
}
else
{
write_byte(0xff);
write_8_bytes(value);
}
}
void history_scan_database::add(const address_bitset& key,
const uint8_t marker, const point_type& point,
uint32_t block_height, uint64_t value)
{
BITCOIN_ASSERT(key.size() >= settings_.sharded_bitsize);
// Both add() and sync() must have identical lookup of shards.
hsdb_shard& shard = lookup(key);
address_bitset sub_key = drop_prefix(key);
BITCOIN_ASSERT(sub_key.size() == settings_.scan_bitsize());
#ifdef HSDB_DEBUG
log_debug(LOG_HSDB) << "Sub key = " << sub_key;
#endif
data_chunk row_data(settings_.row_value_size);
auto serial = make_serializer(row_data.begin());
serial.write_byte(marker);
serial.write_hash(point.hash);
serial.write_4_bytes(point.index);
serial.write_4_bytes(block_height);
serial.write_8_bytes(value);
BITCOIN_ASSERT(serial.iterator() ==
row_data.begin() + settings_.row_value_size);
shard.add(sub_key, row_data);
}
bool add_credit(leveldb::WriteBatch& batch,
const transaction_output_type& output, const output_point& outpoint,
uint32_t block_height)
{
payment_address address;
// Not a Bitcoin address so skip this output.
if (!extract(address, output.script))
return true;
data_chunk addr_key = create_address_key(address, outpoint);
// outpoint, value, block_height
data_chunk row_info(36 + 8 + 4);
auto serial = make_serializer(row_info.begin());
// outpoint
serial.write_hash(outpoint.hash);
serial.write_4_bytes(outpoint.index);
// value
serial.write_8_bytes(output.value);
// block_height
serial.write_4_bytes(block_height);
BITCOIN_ASSERT(
std::distance(row_info.begin(), serial.iterator()) == 36 + 8 + 4);
batch.Put(slice(addr_key), slice(row_info));
return true;
}
void write_network_address(network_address_type addr)
{
write_8_bytes(addr.services);
write_data(addr.ip);
write_data(uncast_type(addr.port, true));
}